CN109519544A - A kind of electric main shaft sealing construction - Google Patents
A kind of electric main shaft sealing construction Download PDFInfo
- Publication number
- CN109519544A CN109519544A CN201811566353.2A CN201811566353A CN109519544A CN 109519544 A CN109519544 A CN 109519544A CN 201811566353 A CN201811566353 A CN 201811566353A CN 109519544 A CN109519544 A CN 109519544A
- Authority
- CN
- China
- Prior art keywords
- main shaft
- sealing
- seal groove
- sealing ring
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses a kind of electric main shaft sealing constructions, including main shaft and drive end bearing bracket, several first sealing rings are machined in the outer circle of main shaft, first sealing ring is in step-like arrangement, the first seal groove is machined on first sealing ring, several second sealing rings are machined in the inner circle of drive end bearing bracket, the radius of first sealing ring and the second sealing ring is from the end close to the main shaft to successively decreasing in the middle part of the main shaft, the second seal groove is machined on second sealing ring, first sealing ring and the second sealing interannular constitute the first gap, first seal groove is corresponding with the second sealing groove location, chamber is constituted between first seal groove and the second seal groove, first gap and chamber constitute labyrinth seal, compressed air access is equipped in drive end bearing bracket, compressed air access and the chamber.Realize that the isolation to foreign matter, gas, liquid inside and outside electro spindle is discharged, and ensures that electro spindle possesses reliable sealing performance.
Description
Technical field
The present invention relates to a kind of sealing structures, more particularly to a kind of electric main shaft sealing construction.
Background technique
With the development of modern industry, in machine industry electro spindle using more and more extensive, demand also increasingly increases.Together
When, it is also higher and higher to performance requirement, the quality requirement of electro spindle.Wherein the sealing problem of electro spindle is asking of frequently encountering
Topic.
Lathe at work, the working environment of electro spindle be usually it is more severe, have serious aqueous vapor or mist of oil, thin
Broken metal is cut.These foreign matters, corrosive gas, liquid enter main shaft, it will lead to the failure of main shaft.And since electricity is main
There will necessarily be gap between the mandrel and shell of axis to ensure the normal operation of main shaft.Therefore, how while ensureing gap
The problem of accomplishing reliable leakproofness, be electro spindle industry, must being faced in especially high-end electro spindle industry.The prior art
In generally use labyrinth ring sealing or air curtain sealing reach seal request, but use labyrinth ring difficult sealing with prevent outside it is different
The risk that there is corrosion is used for a long time in object, the entrance of gas, and air curtain sealing is also difficult to the condensed water etc. generated within sealing
Erosion to main shaft.
Summary of the invention
It is main to solve electricity task of the invention lies in a kind of electric main shaft sealing construction is provided for above-mentioned prior art defect
The sealing problem of axis, prevents the intrusion of foreign and gas, and the impurity of internal generation is discharged, and realizes better seal effect
Fruit.
The technical scheme is that such: a kind of electric main shaft sealing construction, including main shaft and drive end bearing bracket, the main shaft
Be machined with several first sealing rings in outer circle, first sealing ring is in step-like arrangement, the radius of first sealing ring by
Circumferential the first sealing ring in the middle part of main shaft of the first sealing close to the end of the main shaft successively decreases, on first sealing ring
It is machined with the first seal groove, several second sealing rings, the radius of second sealing ring are machined in the inner circle of the drive end bearing bracket
Successively decreased by circumferential the second sealing ring in the middle part of main shaft of the second sealing close to the end of the main shaft, second sealing ring
On be machined with the second seal groove, first sealing ring and the second sealing interannular constitute the first gap, first seal groove with
Second sealing groove location is corresponding, constitutes chamber between first seal groove and the second seal groove, first gap with it is described
Chamber constitutes labyrinth seal, is equipped with compressed air access, the compressed air access and the chamber in the drive end bearing bracket
Connection.
Further, the end of the main shaft is equipped with drip ring, the end face of the anchor ring of the drip ring and the drive end bearing bracket
Equipped with the second gap, second gap is connected to the first gap.
Further, first gap width is 0.2~0.3mm.
Further, second gap width is 0.2~0.3mm.
Further, the lower part of the drive end bearing bracket is equipped with the drainage hole with the chamber.
Further, the compressed air access and the chamber closest to the end of the main shaft.
Further, the drainage hole and the chamber closest to the end of the main shaft.
Further, the bottom radius of first seal groove is from the first seal groove of the end close to the main shaft to leaning on
The first seal groove in the middle part of nearly main shaft successively decreases.
Further, the bottom radius of second seal groove is from the second seal groove of the end close to the main shaft to leaning on
The second seal groove in the middle part of nearly main shaft successively decreases.
Further, the axial width of first seal groove is less than the axial width of second seal groove.
Mechanism of the invention is such, the first sealing ring and the second sealing ring, and the first seal groove and second seal
Slot constitutes labyrinth seal structure, while the labyrinth seal structure is in the step structure of increasing radii from the middle part of main shaft to end
It makes, when main shaft tells rotation, the chamber in the middle part of main shaft can form biggish air pressure, and close to the chamber shape of spindle nose
At lesser air pressure, this enable on main shaft from liquid that condensation generates or other smoothly from the chamber in the middle part of main shaft to
Chamber close to spindle nose discharges, while compressed air is passed through the biggish chamber in space, since chamber section is relatively large,
Enable to stable gas pressure in entire annular compartment, and then form stable air pressure in entire labyrinth seal structure, and with it is outer
Boundary's connectivity part constitutes air curtain, and foreign matter is stopped to enter main shaft.
The advantages of the present invention over the prior art are that: by the labyrinth seal structure of step configuration, pressure difference is formed,
In combination with the air curtain that compressed gas is formed, foreign matter can be stopped to enter main shaft, while also be conducive to itself generate on main shaft
The impurity such as condensed fluid, main shaft can be discharged due to pressure difference, is realized to foreign matter, gas, the liquid outside electro spindle
Effectively isolation ensures that electro spindle possesses reliable sealing performance.
Detailed description of the invention
Fig. 1 is main shaft sealing construction schematic diagram.
Fig. 2 is drive end bearing bracket structural schematic diagram.
Fig. 3 is main axle structure schematic diagram.
Fig. 4 is partial enlarged view at the A of Fig. 1.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but not as a limitation of the invention.
Incorporated by reference to shown in Fig. 1 to Fig. 4, the electric main shaft sealing construction that the present embodiment is related to, including main shaft 1 and drive end bearing bracket 2, it is main
The first sealing ring of twice 3 is machined in the outer circle of axis 1, the quantity of the first sealing ring 3 can be three, four even more, numbers
More preferably sealing effect can be reached by measuring the first more sealing ring 3.The radius of first sealing ring 3 is variation, specifically half
Diameter successively decreases from the first sealing ring 3 of the end close to main shaft 1 to the first sealing ring 3 close to the middle part of main shaft 1, makes each first close
Seal ring 3 is in step-like arrangement.The first seal groove 4 is machined on first sealing ring 3, correspondingly, the bottom radius of the first seal groove 4
Successively decrease from the first seal groove 4 of the end close to main shaft 1 to the first seal groove 4 close to 1 middle part of main shaft.
The basic principle of labyrinth seal is the throttling action formed using gas expansion, therefore in the inner circle of drive end bearing bracket 2
It is machined with the second sealing ring of twice 5, it is identical as the quantity of the first sealing ring 5, the quantity of the second sealing ring 5 is also possible to three,
Four is even more.The radius of second sealing ring 5 is from the second sealing ring 5 of the end close to main shaft 1 to close to 1 middle part of main shaft
Second sealing ring 5 successively decreases, and it is opposite one by one with the first sealing ring 3 to be similarly formed step-like arrangement.Is machined on second sealing ring 5
Two seal grooves 6, the bottom radius of the second seal groove 6 is also from the second seal groove 6 of the end close to main shaft 1 in main shaft 1
Second seal groove 6 in portion successively decreases.
When drive end bearing bracket 2 and main shaft 1 cooperate, the first sealing ring 3 and the second 5 interannulars of sealing constitute the first gap 7, the first sealing
Slot 4 is corresponding with 6 position of the second seal groove, and chamber 8 is constituted between the first seal groove 4 and the second seal groove 6, the first seal groove 4
Axial width ensure that the centrifugation masterpiece that the liquid on main shaft 1 is generated in high-speed rotation less than the axial width of the second seal groove 6
Smoothly accumulated in the second seal groove 6 with lower, will not because of the gap between the first seal groove 4 and the cell wall of the second seal groove 6 and
Flowed in the middle part of to main shaft 1, at the same again convenient for liquid under the differential pressure action of chamber 8 to 1 endwall flow of main shaft without being back to
First seal groove 4.It is interconnected and is constituted by first between the first gap 7 formed between drive end bearing bracket 2 and main shaft 1 and chamber 8
Gap 7 and the spaced labyrinth seal of chamber 8.Since the first sealing ring 3 and the second sealing ring 5 are in step-like setting, and
And first seal groove 4 and the second seal groove 6 bottom radius alternation, radius locating for each chamber 8 of formation is also variation
, therefore when main shaft 1 does high-speed rotation, all differences of pressure in each chamber 8, pressure is by the chamber 8 close to 1 middle part of main shaft
Successively decrease to the chamber 8 close to 1 end of main shaft, therefore impurity can be pushed to discharge.
Compressed air access 9 is additionally provided in drive end bearing bracket 2, compressed air access 9 is connected to closest to the end of main shaft 1 second
The slot bottom of seal groove 6 is connected to the chamber 8 closest to the end of main shaft 1.Gas circuit 11, axis are opened up on the bearing block 10 of main shaft 1
Holding setting sealing ring between seat 10 and drive end bearing bracket 2 is connected to gas circuit 11 with the sealing of compressed air access 9.The end of main shaft 1 is additionally provided with
Drip ring 12, the anchor ring of drip ring 12 and the end face of drive end bearing bracket 2 are equipped with the second gap 13, and the second gap 13 and the first gap 7 connect
Logical, 7 width of the first gap is 0.2~0.3mm, and 13 width of the second gap is 0.2~0.3mm.By the setting in the second gap 13,
Keep the labyrinth seal position that is in communication with the outside vertical with 1 rotation axis of main shaft, therefore the centrifugal force effect generated can guarantee impurity not
Labyrinth seal is easily entered by the second gap 13, while compressed air can be discharged by labyrinth seal by the second gap 13, be increased
The strong sealing effect of labyrinth seal structure.In order to which the condensation generated in labyrinth seal in 1 course of work of main shaft is effectively discharged
The impurity such as water are equipped with the drainage hole 14 that be connected to chamber 8 in the lower part of drive end bearing bracket 2, drainage hole 14 and closest to the end of main shaft 1
Chamber 8 be connected to, when the impurity such as condensed water are discharged from the middle part of main shaft 1 to end, finally in the chamber of the end closest to main shaft 1
It is discharged in room 8 by drainage hole 14.
Claims (10)
1. a kind of electric main shaft sealing construction, including main shaft and drive end bearing bracket, which is characterized in that if being machined in the outer circle of the main shaft
Dry first sealing ring, first sealing ring are in step-like arrangement, and the radius of first sealing ring is by close to the main shaft
Circumferential the first sealing ring in the middle part of main shaft of the first sealing of end successively decreases, and is machined with the first sealing on first sealing ring
Slot is machined with several second sealing rings in the inner circle of the drive end bearing bracket, and the radius of second sealing ring is by close to the main shaft
Circumferential the second sealing ring in the middle part of main shaft of the second sealing of end successively decrease, it is close to be machined with second on second sealing ring
Sealing groove, first sealing ring and the second sealing interannular constitute the first gap, first seal groove and the second sealing groove location
It is corresponding, chamber is constituted between first seal groove and the second seal groove, first gap and the chamber, which are constituted, to be confused
Palace sealing, the drive end bearing bracket is interior to be equipped with compressed air access, the compressed air access and the chamber.
2. electric main shaft sealing construction according to claim 1, which is characterized in that the end of the main shaft is equipped with drip ring,
The end face of the anchor ring of the drip ring and the drive end bearing bracket is equipped with the second gap, and second gap is connected to the first gap.
3. electric main shaft sealing construction according to claim 1, which is characterized in that first gap width be 0.2~
0.3mm。
4. electric main shaft sealing construction according to claim 2, which is characterized in that second gap width be 0.2~
0.3mm。
5. electric main shaft sealing construction according to claim 1, which is characterized in that the lower part of the drive end bearing bracket be equipped with it is described
The drainage hole of chamber.
6. electric main shaft sealing construction according to claim 1, which is characterized in that the compressed air access with closest to institute
State the chamber of the end of main shaft.
7. electric main shaft sealing construction according to claim 5, which is characterized in that the drainage hole and the closest main shaft
End the chamber.
8. electric main shaft sealing construction according to claim 1, which is characterized in that the bottom radius of first seal groove by
The first seal groove close to the end of the main shaft successively decreases to the first seal groove in the middle part of main shaft.
9. electric main shaft sealing construction according to claim 1, which is characterized in that the bottom radius of second seal groove by
The second seal groove close to the end of the main shaft successively decreases to the second seal groove in the middle part of main shaft.
10. electric main shaft sealing construction according to claim 1, which is characterized in that the axial width of first seal groove
Less than the axial width of second seal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811566353.2A CN109519544A (en) | 2018-12-19 | 2018-12-19 | A kind of electric main shaft sealing construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811566353.2A CN109519544A (en) | 2018-12-19 | 2018-12-19 | A kind of electric main shaft sealing construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109519544A true CN109519544A (en) | 2019-03-26 |
Family
ID=65795554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811566353.2A Pending CN109519544A (en) | 2018-12-19 | 2018-12-19 | A kind of electric main shaft sealing construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109519544A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306297A (en) * | 2020-03-16 | 2020-06-19 | 海辰精密机械(嘉兴)股份有限公司 | A airtight structure for power blade holder |
| CN112212007A (en) * | 2020-10-12 | 2021-01-12 | 上海斯晏尔机电设备有限公司 | Underwater mechanical shaft sealing element |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4065136A (en) * | 1977-01-21 | 1977-12-27 | Carrier Corporation | Shaft seal assembly for a rotary machine |
| CN86104543A (en) * | 1985-07-26 | 1987-04-01 | A·W·彻斯特顿公司 | The labyrinth ring seals that has housing mounting means |
| JP2000018395A (en) * | 1998-06-29 | 2000-01-18 | Toyoda Mach Works Ltd | Sealing device for rotating shaft |
| CN1269872A (en) * | 1998-03-13 | 2000-10-11 | 株式会社日立制作所 | Centrifugal compressor and shaft seal used thereof |
| US20030178785A1 (en) * | 2002-03-22 | 2003-09-25 | Koji Egashira | Rotary shaft sealing mechanism and liquid processing apparatus |
| CN101561046A (en) * | 2008-04-18 | 2009-10-21 | 株式会社捷太格特 | Main spindle device |
| CN201444601U (en) * | 2009-06-14 | 2010-04-28 | 山东博特精工股份有限公司 | Electric spindle circular arc moze sealing device |
| CN201836393U (en) * | 2010-11-04 | 2011-05-18 | 北京精雕精密机械制造有限公司 | Shaft end sealing device of vertical electric main shaft |
| US20120319356A1 (en) * | 2010-03-03 | 2012-12-20 | Sew-Eurodrive Gmbh & Co Kg | System for Contactlessly Sealing a Rotably Mounted Shaft from a Housing, and Gear Unit |
| CN102954194A (en) * | 2011-08-30 | 2013-03-06 | 常州市瑞泰工程机械有限公司 | Railway vehicle traveling gearbox sealing structure |
| CN103115152A (en) * | 2013-01-30 | 2013-05-22 | 北京交通大学 | Magnetic fluid and maze alternated type combined sealing |
| CN206280387U (en) * | 2016-11-24 | 2017-06-27 | 新疆乌苏市北方新科有限公司 | The labyrinth oil-sealing arrangement of High-temperature Magnetic Pump bearing housing |
| CN108286608A (en) * | 2018-03-07 | 2018-07-17 | 尹明 | A kind of reflux storage-type waterproof construction |
| US20180355979A1 (en) * | 2015-12-09 | 2018-12-13 | Mitsubishi Hitachi Power Systems, Ltd. | Step seal, seal structure, turbo machine, and method for manufacturing step seal |
| US20190136863A1 (en) * | 2016-05-31 | 2019-05-09 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Labyrinth seal |
| CN209511119U (en) * | 2018-12-19 | 2019-10-18 | 常熟长城轴承有限公司 | A kind of electric main shaft sealing construction |
-
2018
- 2018-12-19 CN CN201811566353.2A patent/CN109519544A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4065136A (en) * | 1977-01-21 | 1977-12-27 | Carrier Corporation | Shaft seal assembly for a rotary machine |
| CN86104543A (en) * | 1985-07-26 | 1987-04-01 | A·W·彻斯特顿公司 | The labyrinth ring seals that has housing mounting means |
| CN1269872A (en) * | 1998-03-13 | 2000-10-11 | 株式会社日立制作所 | Centrifugal compressor and shaft seal used thereof |
| JP2000018395A (en) * | 1998-06-29 | 2000-01-18 | Toyoda Mach Works Ltd | Sealing device for rotating shaft |
| US20030178785A1 (en) * | 2002-03-22 | 2003-09-25 | Koji Egashira | Rotary shaft sealing mechanism and liquid processing apparatus |
| CN101561046A (en) * | 2008-04-18 | 2009-10-21 | 株式会社捷太格特 | Main spindle device |
| CN201444601U (en) * | 2009-06-14 | 2010-04-28 | 山东博特精工股份有限公司 | Electric spindle circular arc moze sealing device |
| US20120319356A1 (en) * | 2010-03-03 | 2012-12-20 | Sew-Eurodrive Gmbh & Co Kg | System for Contactlessly Sealing a Rotably Mounted Shaft from a Housing, and Gear Unit |
| CN201836393U (en) * | 2010-11-04 | 2011-05-18 | 北京精雕精密机械制造有限公司 | Shaft end sealing device of vertical electric main shaft |
| CN102954194A (en) * | 2011-08-30 | 2013-03-06 | 常州市瑞泰工程机械有限公司 | Railway vehicle traveling gearbox sealing structure |
| CN103115152A (en) * | 2013-01-30 | 2013-05-22 | 北京交通大学 | Magnetic fluid and maze alternated type combined sealing |
| US20180355979A1 (en) * | 2015-12-09 | 2018-12-13 | Mitsubishi Hitachi Power Systems, Ltd. | Step seal, seal structure, turbo machine, and method for manufacturing step seal |
| US20190136863A1 (en) * | 2016-05-31 | 2019-05-09 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Labyrinth seal |
| CN206280387U (en) * | 2016-11-24 | 2017-06-27 | 新疆乌苏市北方新科有限公司 | The labyrinth oil-sealing arrangement of High-temperature Magnetic Pump bearing housing |
| CN108286608A (en) * | 2018-03-07 | 2018-07-17 | 尹明 | A kind of reflux storage-type waterproof construction |
| CN209511119U (en) * | 2018-12-19 | 2019-10-18 | 常熟长城轴承有限公司 | A kind of electric main shaft sealing construction |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306297A (en) * | 2020-03-16 | 2020-06-19 | 海辰精密机械(嘉兴)股份有限公司 | A airtight structure for power blade holder |
| CN112212007A (en) * | 2020-10-12 | 2021-01-12 | 上海斯晏尔机电设备有限公司 | Underwater mechanical shaft sealing element |
| CN112212007B (en) * | 2020-10-12 | 2022-10-14 | 上海斯晏尔机电设备有限公司 | Underwater mechanical shaft sealing element |
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Address after: No. 30, Suzhou Road, Changshu City, Suzhou City, Jiangsu Province 215500 Applicant after: Suzhou Great Wall Precision Technology Co.,Ltd. Address before: No. 30, Suzhou Road, Changshu City, Suzhou City, Jiangsu Province 215500 Applicant before: CSC Bearing Co.,Ltd. |
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